Pickhead



S. KOVACEVlC-H.

PlCKHEA-EL APPLICATION FILED JULY 3.1919.

Patnted Apr. 4, 1922.

62?; van Kamaew h UNITED STATES i rhl ENT QFFlQE.

STEVAN KOVACEVICH, OF BLAIR STATION, PENNSYLVANIA.

PICKI-IEAD.

Application filed July 3, 1919.

To all whom it may concern:

Be it known that I, Srnvim KovAoavioH, a citizen of the United States,residing at Blair Station, in the county of Allegheny and State ofPennsylvania, have invented new and useful Improvements in Pickheads, ofwhich the following is a specification.

This invention relates to pickheads, and more particularly to a pickheadprovided with removable terminal elements or points.

One of the main objects of the invention is to provide a pickheadprovided with removable points so that, in the breakage or damage tothese points, they can be readily replaced.

A further object of the invention is to provide simple and eflicientmeans for detach ably securing the points in position.

Further objects will appear from the detailed description.

In the drawings Figure 1 is a side view of a pickhead constructed inaccordance with my invention.

Figure 2 is a section taken substantially on line 22 of Figure 1.

Figure 3 is a fragmentary longitudinal section through the means forsecuring one of the points in position.

Figure 4 is a side view of a hammer-head intended to be substituted forone of the points.

Figure 5 is an outer end View of the same.

Figure 6 is a side view of a blade intended to be substituted for one ofthe pick points.

The pickhead designated by the numeral 1 is of the usual shape and sizeand includes the central eye 2 adapted to receive the usual handle,and'providedat its opposite sides with outwardly projecting arms 3. Eachof the arms 3 is provided, in its outer end, with an inwardly taperingfrusto-conical socket which is adapted to snugly receive acorrespondingly shaped member 4 projecting from the inner end of thepoint The outer end of member 4 is of less cross area than the inner endof point 5 thus leaving a shoulder 6 which is adapted to fit snuglyagainst the outer end of arm 3 when the point is in normal position soas to effect a close con tact therewith. The member 4 is provided with avertically extending tapering slot '7 which is adapted to receive atapering wedge 8, this wedge also extending through alined slots in arm3 at the opposite sides of the socket 3 thereof. As will be noted moreSpecification of Letters Patent.

iatented Apr. 4, 1922.

Serial No. 308,459.

clearly from Figures 1 and 3, the upper end 8 of wedge 8 is rounded soas to facilitate insertion of the same into the lower tapering slot 3 ofarm 3, the lower end of this wedge, when in its innermost position,being flush with the under face of In practice the member 4 of point 5,is fitted into socket 3 of arm 3 thus bringing the slot 7 intosubstantial register with slots 8 after which wedge 8 is driven tightlyinto position as shown inFigures 1 and 3 so as draw the point 5 intotight engagement with the outer end of arm 3. After this has been done,the wedge 8 may be secured in position by a screw 9 which is threadedthrough the wall of arm 3, this screw having its inner end portionshaped to provide a conical element 10 adapted for engagement through afrusto-conical aperture extending through one side of member 4, theinner end portion of the conical member 10 fitting into a conical recessprovided in wedge 8 for this purpose, as shown in Figure 2. This screwacts to efiectively secure the wedge against all looseness or play. Byloosening the screw the wedge may be readily driven out of the arm 3 andmember 4 thus permitting the point 5 to be quickly and easily replaced.In Figures 4, 5 and 6, I' have illustrated other forms of tools whichmay be substituted for the point 5 thus providing a combined pick andhammer or are, as may be desired. The hammer-head illustrated in Figures4'and 5 and the cutting member or blade illustrated in Figure 6 areintended to be secured in the arm 3 of the head in the same manner asthe points 5 are secured in operative position.

Having described my invention, what I claim is: V

1. A pickheadhaving an arm with a square outer end 'and containing. aninwardly-tapered socket, of rectangular crosssection, extendinglongitudinally inward from said end and entirely closed on four sidesand also containing a tapered aperture extending between opposite sidesof the arm and intersecting said socket, and a threaded aperture in onewall of the socket and at right angles to said intersecting aperture, incombination with a detachable point hav ing a square shoulder opposed tothe square outer end of the pickhead arm and also having a taperedshank, of rectangular crosssection, arranged in the socket in said armand in which is a tapered aperture adapted to register with saidintersecting aperture of the arm and in Which is also a tapered apertureadapted to register with the threaded aperture in the arm, a taperedWedge removably arranged in the apertures of the arm and point shank andhaving a seat in one of its sides, and a removable screw bearing in thethreaded aperture of the arm and having an inner tapered end portionoccupying the second-named tapered aperture in the point shank anddisposed in the seat in the side of the Wedge. V

2. The combination of a pickhead arm, a point having a shank, a Wedge,and a screw the shank being socketed and completely housed in thepickhead arm, and the wedge being socketed in both pickhead arm andshank; and the screw bearing in the pickhead arm and extending through aportion of the shank and into the wedge.

3. The combination of a pickhead arm, a point having a shank, and awedge, said shank being socketed and completely housed in the pickheadarm, and the Wedge being socketed in both pickhead arm and shank, ofmeans extending through and engaging said arm and shank and seated inthe Wedge and detachably securing the same togethen In testimony whereofI afliX mV sTEvAN KOVACEVICH.

si nature. V

